#!/usr/local/bin/php
<?php

/////////////////////////////////////////////////////////////////////////////////
// Bootstrap.

$PHABRICATOR_ROOT = dirname(dirname(dirname(__FILE__)));
require_once $PHABRICATOR_ROOT.'/scripts/__init_script__.php';

/////////////////////////////////////////////////////////////////////////////////
// Command line.

if (count($argv) != 3) {
  print("Usage: $argv[0] <conduit_token_file> <output_directory>\n");
  die;
}

$CONDUIT_TOKEN_FILE = $argv[1];
$OUTPUT_DIR = $argv[2];

/////////////////////////////////////////////////////////////////////////////////
// Global configuration.

$HOST = 'phabricator.local';

/////////////////////////////////////////////////////////////////////////////////
// Utilities.

// Create an instance of the AphrontApplicationConfiguration configured with all
// invariant settings (settings which do not change between handlers of different
// revisions).
function CreateApplicationConfiguration() {
  global $HOST;

  $application_configuration = new AphrontApplicationConfiguration();
  $application_configuration->setHost($HOST);
  return $application_configuration;
}

/////////////////////////////////////////////////////////////////////////////////
// Global state.

$site = id(new PhabricatorPlatformSite());

$viewer = PhabricatorUser::getOmnipotentUser();

$application_configuration = CreateApplicationConfiguration();

$application = id(new PhabricatorDifferentialApplication());
$revision_controller = id(new DifferentialRevisionViewController())
  ->setCurrentApplication($application);

$routing_map = id(new AphrontRoutingMap())
  ->setSite($site)
  ->setApplication($application)
  ->setRoutes($application->getRoutes());

$conduit = id(new ConduitClient('https://developer.blender.org/api/'))
  ->setConduitToken(trim(file_get_contents($CONDUIT_TOKEN_FILE)));

/////////////////////////////////////////////////////////////////////////////////
// Baking logic and loop.

function EnsureDirectoryOrDie($dir) {
  if (!is_dir($dir)) {
    if (!mkdir($dir, 0777, true)) {
      print("Error creating output durectory $dir\n");
      die;
    }
  }
}

function EnsureOutputDirectoryOrDie() {
  global $OUTPUT_DIR;
  EnsureDirectoryOrDie($OUTPUT_DIR);
}

function MakeGenericOutputDirectory($subject) {
  global $OUTPUT_DIR;

  $dir = $OUTPUT_DIR . DIRECTORY_SEPARATOR . $subject;
  EnsureDirectoryOrDie($dir);

  return $dir;
}

function MakeRevisionBaseOutputFileName($revision, $diff_id, $subject) {
  $dir = MakeGenericOutputDirectory($subject);

  $file_name = $dir . DIRECTORY_SEPARATOR . 'D' . $revision->getID();

  if (!is_null($diff_id)) {
    $file_name .= '.' . $diff_id;
  }

  return $file_name;
}

function MakeRevisionHTMLOutputFileName($revision, $diff_id) {
  return MakeRevisionBaseOutputFileName(
      $revision, $diff_id, 'revision') . '.html';
}

function MakeRawDiffOutputFileName($revision, $diff_id) {
  return MakeRevisionBaseOutputFileName(
      $revision, $diff_id, 'raw_diff') . '.diff';
}

function MakePasteOutputFileNameFromHandle($handle) {
  return MakeGenericOutputDirectory('paste') .
      DIRECTORY_SEPARATOR .
      $handle->getName() . '.txt';
}


function MakeFileOutputFileNameFromFile($file) {
  $dir = MakeGenericOutputDirectory('file');

  $id = $file->getID();

  EnsureDirectoryOrDie($dir . DIRECTORY_SEPARATOR . 'F' . $id);

  return  $dir.
      DIRECTORY_SEPARATOR .
      $file->getSafeFileNameForBake();
}

function BakeDifferentialToResponse($revision, $diff_id = NULL) {
  global $application_configuration;
  global $revision_controller;
  global $routing_map;
  global $viewer;

  $revision_id = $revision->getID();

  if (is_null($diff_id)) {
    printf('Baking D' . $revision_id . ' ...' . "\n");
  } else {
    printf('Baking D' . $revision_id . ', diff ' . $diff_id . ' ...' . "\n");
  }

  $path = '/D' . $revision_id;

  $route_result = $routing_map->routePath($path);
  $uri_data = $route_result->getURIData();

  $application_configuration->setPath($path);

  $request_data = array(
  );

  if (!is_null($diff_id)) {
    $request_data['id'] = $diff_id;
  }

  $request = $application_configuration->buildRequest()
    ->setUser($viewer)
    ->setRequestData($request_data)
    ->setURIMap($uri_data);

  $response = id($revision_controller)
    ->setRequest($request)
    ->handleRequest($request);

  return $response;
}

function BakeResponseToHTML($response) {
  $html = '';
  foreach ($response->renderChildren() as $child) {
    $html .= $child->render();
  }

  return $html;
}

function StorePasteHandle($handle) {
  global $viewer;

  $file_name = MakePasteOutputFileNameFromHandle($handle);
  if (file_exists($file_name)) {
    return;
  }

  $paste = id(new PhabricatorPasteQuery())
    ->setViewer($viewer)
    ->withPHIDs(array($handle->getPHID()))
    ->needRawContent(true)
    ->executeOne();

  file_put_contents($file_name, $paste->getRawContent());
}

function StoreFile($file) {
  print("Loading and storing file F{$file->getID()}\n");
  $file_name = MakeFileOutputFileNameFromFile($file);
  file_put_contents($file_name, $file->loadFileData());
}

function StoreFileHandle($handle) {
  global $viewer;

  $file = id(new PhabricatorFileQuery())
    ->setViewer($viewer)
    ->withPHIDs(array($handle->getPHID()))
    ->needTransforms(
      array(
        PhabricatorFileThumbnailTransform::TRANSFORM_PREVIEW,
    ))
    ->executeOne();

  $file_name = MakeFileOutputFileNameFromFile($file);
  if (file_exists($file_name)) {
    return;
  }

  StoreFile($file);

  $preview_xform = $file->getTransform(PhabricatorFileThumbnailTransform::TRANSFORM_PREVIEW);
  if ($preview_xform) {
    StoreFile($preview_xform);
  }
}

function StoreResponseAttachments($response) {
  $user = $response->getRequest()->getUser();
  $handlePool = $user->getHandlePool();
  $handles = $handlePool->getHandles();

  foreach ($handles as $phid => $handle) {
    $type = $handle->getType();
    if ($type == PhabricatorPastePastePHIDType::TYPECONST) {
      StorePasteHandle($handle);
    } else if ($type == PhabricatorFileFilePHIDType::TYPECONST) { 
      StoreFileHandle($handle);
    } else {
      // print("$type\n");
    }
  }
}

function StoreRawDiff($revision, $diff_id) {
  if (is_null($diff_id)) {
    return;
  }

  global $viewer;
  global $conduit;

  $output_file = MakeRawDiffOutputFileName($revision, $diff_id);
  if (file_exists($output_file)) {
    return;
  }

  print("Requesting and storing the raw diff ...\n");

  $diff = id(new DifferentialDiffQuery())
    ->setViewer($viewer)
    ->withIDs(array($diff_id))
    ->needChangesets(true)
    ->executeOne();

  $raw_changes = $diff->buildChangesList();

  $changes = array();
  foreach ($raw_changes as $changedict) {
    $changes[] = ArcanistDiffChange::newFromDictionary($changedict);
  }

  $bundle = ArcanistBundle::newFromChanges($changes);
  $bundle->setConduit($conduit);
  $raw_diff = $bundle->toGitPatch();

  file_put_contents($output_file, $raw_diff);
}

function BakeDifferentialToFile($revision, $diff_id = NULL) {
  $response = BakeDifferentialToResponse($revision, $diff_id);

  $html = BakeResponseToHTML($response);

  $output_file = MakeRevisionHTMLOutputFileName($revision, $diff_id);
  file_put_contents($output_file, $html);

  file_put_contents($output_file . '.title', $response->getTitle());

  StoreResponseAttachments($response);
  StoreRawDiff($revision, $diff_id);
}

EnsureOutputDirectoryOrDie();

print('Querying differential revisions from the database ... ' . "\n");
$revisions = id(new DifferentialRevisionQuery())
  ->setViewer($viewer)
  ->needDiffIDs(true)
  ->setOrder('oldest')
  ->execute();

foreach ($revisions as $revision_id => $revision) {
  BakeDifferentialToFile($revision);

  foreach ($revision->getDiffIDs() as $diff_id) {
    BakeDifferentialToFile($revision, $diff_id);
  }
}

?>